i did a EMG bridge PU swap with a trem guitar making a clip of each PU.
I could swap the pickups out while doing a dive bomb. just 2 screws on the PU ring. it was like 1-2 minutes between takes.
It was the AHB-3n, 81, 85 and 60x. They all sounded and felt clearly different in the room with the amp. I mic'd it with a e609 direct into a low budget audio IF. i could hear a minimal to no difference on the recordings but would fail in a blind test. the EMG60 didn't distort as much and was a bit brighter with the least bass. the AHB-3n being the loudest and the EMG 85 was a bit beafier than the 81. but at one point i thought i made an error exporting them and they are all the same (there not).
my findings with PUs so far are, all depending on the guitar, it could be from "doesn't matter" or "make or break" a sound.
Because i had PU/guitar combos that sounded horrible. usually this happens, if it gets too fat and the attack is not clear enough for me.